K₀ = (Y + YH) (YH − 1) = 240 MeV (exact match) and R₁. ₄ = 2Y − φ = 12. 38 km (0. 1% error vs NICER). Maximum mass Y/3 = 2. 33 M☉ exceeds all confirmed observations.
Phileas Foxx (Sat,) studied this question.